This ruler is a must-have for aviation enthusiasts and collectors alike. Made in the United States, it bears the logo of the Aircraft Owners & Pilots Association (AOPA) and includes measurements for cruising altitude (MSL). Whether you're a seasoned pilot or simply interested in aviation memorabilia, this ruler is sure to be a unique addition to your collection. Perfect for display or practical use, it's a great way to show your passion for all things aviation.